T-Mobile officials say someone took socialite Paris Hilton's list of famous phone numbers and personal information and posted it all online.

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A T-Mobile spokesman said the company suspected the information was stolen by a hacker or someone who knew the password for the mobile phone owned by the much-watched blonde offspring of Hilton hotels fame, CNN/Money reported.

Hilton had a Sidekick II mobile phone, which uses an online server to store at least some information.